LAPD patrol vehicle upgrades include sirens drivers can feel

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[BenLurkin]

The Los Angeles Police Department is adding new technology to its black-and-white patrol vehicle fleet, including upgraded sirens designed to alert drivers sooner and improve safety.

The so-called Rumbler low-frequency warning system works alongside existing sirens to produce low-frequency sound waves that motorists and pedestrians can both hear and feel.

Unlike conventional sirens, police say the low-frequency tones can penetrate sound-insulated vehicles, giving drivers more time to react to approaching emergency vehicles.

[Scrambler Bob]

Will any low frequency sound waves cause bowel elimination?

[Salamander]

The rapmobiles instantly provoke me to ponder violence.

Sirens, not so much.